Phonograph.



G. W. LORIMER.

PHONOGRAPH.

APPLICATION FILED on. 6. {915.

1,270,534. Patented June 25, 191&

caches-w. Lommnn; or 1 1cm, omok,

a ucaut mqpttober 6,1915. Serial so.

' exact description.

My invention relates to improvements in sound conducting horns and moreparticularly to phonograph horns. p

The object of the invention is to provide a phonograph horn, the wallsof which. are under stress of such a character that the tone of theinstrument is much improved.

. Specification of Letters Patent.

. HIHONOGRAPH.

Patented June 25, 191's.

other fiber-horns, the latter material being used in connection withexpensive machines. I

' The opening through which the sound issues may be closed b ratan 15 orany other suitable closure may be provided.

, I have found in practice that by maintaining the horn under tensionthe sound is greatly improved, thevibrations being effected in suchmanner as to produce tones in [a moderate priced instrument which coin-A more specific object is to provide a ph'opograph horn of noncollapsible material, the Wall at one end of which, is maintained underconstant tension.

In the accompanying drawings, I have illustrated one embodiment of theinvention. Other embodiments however, may be devised.

Figure 1 is an elevation partlyin section of a phonograph which willserve to illus trate the improvement.

Fig. 2 is a side elevation thereof section.

The phonograph is provided with the usual case or box 1, containingsuitable driving mechanism 2 for rotating the supporti disk 3 and thephonograph record 4 place thereon. The reproducer 5 may be of stand: ardconstruction and opens through suitable partly larly "adapted foradvantage in connection tubing 6, 7 to thephonograph horn, which isindicated as a whole by reference 8. In the present illustration, thehorn is made of metal and is of circular cross section at one,

end 9, but is of oval cross section at the other end 10, theintermediate portion being flaring. This shape may-be obtained by usingva funnel shaped horn and widening-it at' the large end to partiallyflatten it out. g The oval end of the horn is maintained under tensionby means of a pair of semicircular brackets 11, each provided with anextension 12 passing through the wall ofthe case 1, and secured by nuts13, hearing against washers 14. By tightening up on the nuts 13, thebrackets 11 are drawn apart and the pull thus'results inadjustingtheonly with metal horns but with wood andthe cabinet.

pare favorably with those of the most'expensivephonographs on themarket. The

tension may be maintained in other ways than illustrated and the shapeof the horn need not necessarily be that shown in the drawings. 1 do notlimit myself to horns formed of the materials specified, since othermaterials including flexible material of vari-' ous kinds maybesatisfactorily employed. Furthermore, while the present improvementshave been described herein as particuuse in connection; with it isobvious that said improvements are of much broaderadaptation, and henceit is not desired to limit the same to the particular use shown anddescribed, For instance, closed herein, whereby the tone qualities of ahorn are improved, might also be used to with telephones,

phonograph horns,

the larger and more the principle dismegaphones, and various other typesof.

horns. to the details of construction described, except wherelimitations appended claims. 7

What I claim as new and desire to obtain f by Letters Patent of theUnited States is:

. materia 1. A non-collapsible horn, the walls of whichare maintainedunder tension to improve the quality of the tone. Y

2. A phonograph horn of non-collapsible the wall at maintained undertension to improve the quality of the tone.

Neither" do I desire to limit myselfare imposed. in the one end ofwh1ch'is 3 The combination with a phonograph horn, of means for drawingthe walls apart at one end thereof to maintain said walls underte'nsionto improve the quality of the tone.

4. A phonograph having a flaring horn of non-collapslble material, andmeans for maintaining the large end thereof under:

constant stress.

.5. In a phonograph, the combination with the casing thereof, of apartially flattened sion.

9. In a phonograph, the combination with the casing thereof, of a horn,brackets fit-- horn of flexiblematerial in the base thereof, the smallend of said horn being circu-. lar and the large end thereof being 4semi-circular brackets fitting withm the ends of said oval, extensionsthereon passing through the walls of said casing and means on theoutside of said walls for drawa ing said brackets apart to maintainsaid" horn under tension.

6. In a phonograph; the combination'with a non-collapsible horn, ofmeans for supporting the outlet end thereof and maintaining it undertension.

7. A honograph havin a permanently orn, the Walls of which are supshapedported under tension. I 1 8. In a phonograph, the combination withmaintain the walls of said horn un ertenting within said horn,extensions on said brackets passing through the walls of said casing,and'means on theputside of'said'" walls for drawing said brackets apartto maintain said horn under tension.

oval,

'10. In a phonograph, the' combination with the casing thereof, of ahorn, one end of which is supported by said casing, and adJuStabIe meanssupporting the other .end

' of said horn-under-tension and out of contact with said casing 11; In,combination, a sound conducting horn, means for maintaining the Walls ofsaid horn under sufficient tension to modify the tone qualities thereof,and means for adjustingsaid tension.-

12. In combination, aflaring sound conducting horn, means tending to"enlarge the opening ,at the large end of said horn to thereby maintainthe adjacent walls under tension, and means for adjusting said ten- 13.-In combinatiom'a sound conducting horn, a'housing therefor, and meanscooperat ng with said housing and with said horn to support the latterwith its walls out of contact with said housing. and to maintain saidwalls under tension.

In witnesswhereof, I, hereunto subscribe my name th s 2nd. day ofOctober, A. D.

@GEORGEW. YLORIMER! Witness 3 FRA Gemin

